Question

Write a tester program to test the mobile class defined below.

Create the class named with your id (for example: Id12345678) with the main method.

1. Create two mobiles M1 and M2 using the first constructor.
2. Print the characteristics of M1 and M2.
3. Create one mobile M3 using the second constructor.
4. Change the id and brand of the mobile M3. Print the id of M3.

Your answer should include a screenshot of the output. Otherwise, you will be marked zero for this question.

public class Mobile {

private int id;

private String brand;

public Mobile() {

    id = 0;

    brand = "";

}

public Mobile(int n, String name) {

    id = n;

    brand = name;

}

public void setBrand(String w) {

    brand = w;

}

public void setId(int w) {

    id = w;

}

Public int getId() {

Answer 1

class Mobile {

private int id;

private String brand;

public Mobile() { // Constructor 1 - Default Constructor

id = 0;

brand = "";

}

public Mobile(int n, String name) { // Constructor 2 - Parameterised Constructor

id = n;

brand = name;

}

public void setBrand(String w) {

brand = w;

}
public void printCharacterstics()
{
System.out.printf("Id:%d\n",id);
System.out.printf("Brand:"+brand,"\n");
System.out.printf("\n");
}
public void setId(int w) {

id = w;

}

public int getId()
{
return id;
}
public int changeId(int n){
id = n;
return 0;
}
public int changeBrand(String b){
brand = b;
return 0;
}

}
class Main
{
   public static void main(String[] args) {
   Mobile m1 = new Mobile(); // Create object m1 with constructor 1

   Mobile m2 = new Mobile(); // Create object m2 with constructor 1

   m1.setId(1100123456); // Set the id of m1

   m1.setBrand("Samsung"); // Set the Brand of m1

   m2.setId(1100654123); // Set the id of m2

   m2.setBrand("Apple"); // Set the Brand of m1

   System.out.println("Characterstics of M1:\n");

   m1.printCharacterstics(); // Call function printCharacterstics to print the characterstics

   System.out.println("\nCharacterstics of M2:\n");

   m2.printCharacterstics();

   Mobile m3 = new Mobile(1100789456,"Huwai"); // Create the object m3 with second constructor

   System.out.printf("\nCharacterstics of M3:\n");

   m3.printCharacterstics();

   m3.changeId(1234567890); // Change the id of m3

   m3.changeBrand("OnePlus"); // Change the brand of m3

   System.out.printf("\nId of M3(After Change):%d",m3.getId()); // Print the id of m3

  
   }
}

OUTPUT: